OBJECTIVE：To provide reference for r ational use of TCM decoction piece. METHODS ：Electronic questionnaire survey was conducted on the use （dose，ingredient number ）of TCM decoction piece prescriptions in 12 TCM hospitals from 10 provinces（regions，cities）. Through the hospital information system ，416 100 outpatient prescriptions of TCM decoction piece were collected from the First Affiliated Hospital of Henan University of TCM （our hospital ）during May 2016 to Apr. 2019，and were analyzed in terms of prescription dose ，the number of ingredients and use of TCM decoction pieces. At the same time ，the use of TCM decoction piece prescription were analyzed in different departments ，and the clinical application status of TCM decoction pieces prescription were investigated and relevant suggestions were put forward. RESULTS ：The average dose of TCM decoction piece prescriptions in 12 hospitals were 129.60-245.00 g，and the average number of ingredients were 11.90-18.25；the average dose of TCM decoction piece prescriptions in pediatric department was lower than other departments. The average dose of TCM decoction piece prescriptions in our hospital was 242.21 g；55.75％ of the prescription dose were distributed in 201-300 g，and 15.22％ were over 300 g. The average number of ingredients in prescriptions was about 15，and the prescriptions with 11-20 ingredients accounted for 87.75％，those with more than 20 ingredients accounted for 6.64％. Top 20 TCM decoction pieces in TCM prescriptions of our hospital had different degrees of overdose. Three decoction pieces with the highest frequency of overdose were Radix Curcumae processed by vinegar （85.51％），Atractylodes macrocephala stir-fried with bran （82.10％）and A. macrocephala（79.13％）. The number of TCM decoction piece prescriptions in internal medicine department accounted for 40.84％ in our hospital ；there were a lot of TCM prescriptions with dose exceeding 300 g（11.98％ and 18.69％）and the number of ingredients exceeding 18（14.60％ and 9.53％）in internal medicine department and surgery department. The proportion of pediatric TCM decoction piece prescriptions with more than 18 ingredients accounted for 24.09％. CONCLUSIONS ：The overall dosage of TCM decoction piece prescriptions is relatively high ，the number of ingredients is too much ，and the overdose of single-flavored TCM decoction piece is common. Internal medicine department and surgery department should focus on controlling the number of and the dosage of single-flavored decoction pieces of TCM prescriptions to standardize the prescribed dosage. Gynecology department needs to focus on controlling the dosage of single-flavored TCM pieces and pediatrics department should pay special attention to the use of prescription ingredients ，so as to ensure a more scientific and reasonable standard for the clinical application of TCM decoction piece.